Our study shows that ocular motor function in patients with anti-IgLON5 differs from those of patients with PSP, foremost concerning saccade velocity and accuracy, the presence of SWJ and the clinical finding of supranuclear gaze palsy, which was only found in a single patient with anti-IgLON5 disease. This evidence concerns the gene IGLON5 and supranuclear palsy, progressive, 1.